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SE507308C2 - Method and apparatus for providing a joint seal of polymer-coated aluminum - Google Patents

Method and apparatus for providing a joint seal of polymer-coated aluminum

Info

Publication number
SE507308C2
SE507308C2 SE9504565A SE9504565A SE507308C2 SE 507308 C2 SE507308 C2 SE 507308C2 SE 9504565 A SE9504565 A SE 9504565A SE 9504565 A SE9504565 A SE 9504565A SE 507308 C2 SE507308 C2 SE 507308C2
Authority
SE
Sweden
Prior art keywords
inductor
current
polymer
conductors
providing
Prior art date
Application number
SE9504565A
Other languages
Swedish (sv)
Other versions
SE9504565D0 (en
SE9504565L (en
Inventor
Anders Hilmersson
Gert Holmstroem
Haakan Andersson
Original Assignee
Tetra Laval Holdings & Finance
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings & Finance filed Critical Tetra Laval Holdings & Finance
Priority to SE9504565A priority Critical patent/SE507308C2/en
Publication of SE9504565D0 publication Critical patent/SE9504565D0/en
Priority to AU12186/97A priority patent/AU1218697A/en
Priority to PCT/SE1996/001703 priority patent/WO1997022523A1/en
Publication of SE9504565L publication Critical patent/SE9504565L/en
Publication of SE507308C2 publication Critical patent/SE507308C2/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K13/00—Welding by high-frequency current heating
    • B23K13/01—Welding by high-frequency current heating by induction heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3668—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

In order to accomplish a longitudinal joint of polymer lined aluminium with induction heat the current in an inductor (2) at the joint can be concentrated in that several parallel current conducting conductors (4, 5) are laid next to each other. Especially, four litz wires (5) can be laid in the web of an I-beam (4), which constitutes a fifth conductor and a means for applying pressure on the joint.

Description

W ß 20 25 30 35 5o7Ü5os 3' ¿ fig 5 är en förenklad sektion längs linjen V-V i fig 3 samt fig 6 år en vy uppifrån i mindre skala av en dorn för användning tillsammans med den i fig 1-5 visade induktor- balken. Fig. 5 is a simplified section along the line V-V in Fig. 3 and Fig. 6 is a top view on a smaller scale of a mandrel for use with the inductor beam shown in Figs. 1-5.

Beskrivning av föredragna utföringsformer Ett stympat koniskt förpackningsâmne 1 skall med ut- gångspunkt från ett plant ark ges den på ritningarna visade koniska formen och på det sätt som är föremål för uppfin- ningen förses med en längdskarv, varpå det kan utrustas med botten och lock på ett här ej visat och beskrivet sätt.Description of preferred embodiments A truncated conical packaging blank 1 shall, based on a flat sheet, be given the conical shape shown in the drawings and in the manner which is the subject of the invention be provided with a longitudinal joint, whereupon it can be equipped with a bottom and lid on a way not shown and described here.

Förpackningsämnet 1 är företrädesvis framställt av aluminium med en tjocklek av 50-300 pm, exempelvis 85 pm.The packaging blank 1 is preferably made of aluminum with a thickness of 50-300 μm, for example 85 μm.

Aluminiumytan är åtminstone på ena sidan belagd med en för- seglingsbar polymer, exempelvis en polyester, men ofta på båda sidorna.The aluminum surface is coated on at least one side with a sealable polymer, for example a polyester, but often on both sides.

För att åstadkomma en längdskarv hos förpacknings- ämnet 1 utnyttjas induktionsvärmeteknik. För detta ändamål används en induktorbalk 2 och som mothàll en i fig 6 antydd dorn 3 av exempelvis vävbakelit.To achieve a longitudinal joint of the packaging blank 1, induction heating technology is used. For this purpose an inductor beam 2 is used and as a support a mandrel 3 of, for example, fabric bakelite indicated in Fig. 6.

Att försegla förhållandevis tjock, polymerbelagd alu- minium med induktionsvârme innebär speciella problem fram- för allt på grund av materialets låga resistans och goda värmeledningsförmåga. Med normala envarviga induktorer blir strömmen i induktorn och tillhörande anpassningstransforma- tor oacceptabelt hög.Sealing relatively thick, polymer-coated aluminum with induction heat entails special problems, primarily due to the material's low resistance and good thermal conductivity. With normal single-speed inductors, the current in the inductor and associated matching transformer becomes unacceptably high.

Problemet kompliceras ytterligare vid längdskarvsför- segling, där den inducerade strömmen skall följa materia- lets kant så långt som möjligt och sedan snabbt svänga av.The problem is further complicated by longitudinal joint sealing, where the induced current must follow the edge of the material as far as possible and then quickly turn off.

Vid sättet enligt uppfinningen utnyttjas i stället en flervarvig induktor, företrädesvis en induktor med fem varv. I det visade fallet är ett varv vid stället där längdskarven skall åstadkommas utformad som en I-balk 4, medan de övriga varven utgörs av litztråd 5. En litztråd innehåller ett stort antal från varandra isolerade ledare, 10 15 20 25 30 35 5 507 308 i föreliggande fall ca 400 ledare inom en total diameter av 2 mm, och ger därigenom en i tråden jämnt fördelad ström.In the method according to the invention, a multi-turn inductor is preferably used, preferably a five-turn inductor. In the case shown, a turn at the place where the longitudinal joint is to be achieved is formed as an I-beam 4, while the other turns are made of litz wire 5. A litz wire contains a large number of conductors insulated from each other, 10 15 20 25 30 35 5 507 308 in the present case about 400 conductors within a total diameter of 2 mm, thereby giving a current evenly distributed in the wire.

I-balksformen är vald för att det för förseglingen nödvändiga trycket på skarven skall kunna appliceras, och litztrådarna 5 är lagda i I-balkens liv för att koncentrera strömmen och åstadkomma den för snabb smältning och förseg- ling nödvändiga värmen. I-balken 4 med sina litztrådar 5 är infälld i ferritisk massa för att koncentrera strömmen. Vid försegling av 85 pm aluminium kan förseglingstider av 30- 300 ms åstadkommas.The I-beam shape is chosen so that the pressure necessary for the seal can be applied to the joint, and the litz wires 5 are laid in the life of the I-beam to concentrate the current and provide the heat necessary for rapid melting and sealing. The I-beam 4 with its litz wires 5 is recessed in ferritic mass to concentrate the current. When sealing 85 μm aluminum, sealing times of 30- 300 ms can be achieved.

Alla returledarna av litztråd 5 (till vänster i fig 4 och 5) är lagda intill varandra under en kopparplåt 6 i in- duktorbalkens inneryta med syfte att fördela strömmen.All the return conductors of litz wire 5 (on the left in Figs. 4 and 5) are laid next to each other under a copper plate 6 in the inner surface of the inductor beam for the purpose of distributing the current.

Induktorbalken 2 kan vara försedd med skruvhål 2' för sin montering vid den ej visade maskinen för skarvningen.The inductor beam 2 can be provided with screw holes 2 'for its mounting at the machine (not shown) for splicing.

Vid överlappsskarvar, som det här är fråga om, ut- vecklas normalt värmen i det metallskikt som ligger närmast induktorn, Detta innebär att det kan uppstå en exempelvis ca 5 mm bred bränd zon på förpackningsmaterialets yta. Den- na måste då vara dekorfri på samma sätt som vid stålburkar och liknande med svetsad längdskarv.In the case of overlapping joints, as is the case here, the heat normally develops in the metal layer closest to the inductor. This means that a burnt zone, for example about 5 mm wide, can occur on the surface of the packaging material. This must then be decor-free in the same way as with steel cans and the like with welded longitudinal joints.

.»Om parterna i längdskarven emellertid läggs på det sätt som framgår av fig 4 och 5, dvs om den part på vilken returlitztrådarna 5 och kopparplåten 6 anligger läggs un- derst i skarven, kommer såväl förseglingsströmmen som re- turströmmen att gåui den undre parten och sålunda värmen att koncentreras till det undre plåtskiktet..Härigenom sker 'uppvärmningen av det övre plåtskiktet underifrån, och det övre tryckta dekorskiktet skadas ej.However, if the parts of the longitudinal joint are laid in the manner shown in Figures 4 and 5, ie if the part on which the return lint wires 5 and the copper plate 6 abut is laid at the bottom of the joint, both the sealing current and the return current will go to the lower part. and thus the heat to be concentrated to the lower sheet metal layer. Thereby the heating of the upper sheet metal layer takes place from below, and the upper printed decorative layer is not damaged.

Där strömmen vänder vid längdskarvens ytterändar, blir strömtåtheten så stor att materialet i förpacknings- âmnet skadas. Detta problem kan undvikas genom att en kop- parremsa 7 (fig 6) anordnas på dornen eller mothållet 3 på förpackningsämnets 1 baksida i anslutning till stället där strömmen vänder. En sådan remsa 7 är i sin längdriktning 10 15 507 308 inskjuten några mm innanför längdskarvens ände. Den tar hand om den vändande strömmen och avlastar skarven. En sådan remsa 7 är normalt anordnad vid vardera änden av lângdskarven. Det kan emellertid också förekomma att för- packningen förses med ett lock före längdskarvningen, var- vid det räcker med en remsa 7 vid skarvens fria ände.Where the current turns at the outer ends of the longitudinal joint, the current density becomes so great that the material in the packaging blank is damaged. This problem can be avoided by arranging a copper strip 7 (Fig. 6) on the mandrel or abutment 3 on the back of the packaging blank 1 in connection with the place where the current turns. Such a strip 7 is inserted in its longitudinal direction 10 507 308 a few mm inside the end of the longitudinal joint. It takes care of the reversing current and relieves the joint. Such a strip 7 is normally arranged at each end of the longitudinal joint. However, it may also happen that the package is provided with a lid before the longitudinal splicing, whereby a strip 7 at the free end of the splice is sufficient.

Som en modifikation till den ovan angivna och på ritningarna visade utföringsformen med en I-balk kan man tänka sig andra profiler, såsom en U- eller T-balk, och antalet litztrådar kan exempelvis ligga i området 3-7.As a modification to the above-mentioned embodiment shown in the drawings with an I-beam, other profiles are conceivable, such as a U-beam or T-beam, and the number of litz wires can be in the range 3-7, for example.

Ett annat sätt att åstadkomma den önskade effekten med strömkoncentration och tryckappliceringsförmåga är att som induktor anordna ett antal, exempelvis fem, intill varandra stående, men från varandra isolerade koppar- stänger, vardera med en höjd av 4-5 mm och en tjocklek av 0,8 mm. I returledningsfasen kan dessa kopparstänger vara vridna 90° och ligga på något avstånd från varandra.Another way of achieving the desired effect with current concentration and pressure applicability is to arrange as an inductor a number, for example five, adjacent, but insulated copper rods, each with a height of 4-5 mm and a thickness of 0, 8 mm. In the return line phase, these copper rods can be rotated 90 ° and lie at some distance from each other.

Claims (9)

10 15 20 25 30 PATENTKRAV10 15 20 25 30 PATENT REQUIREMENTS 1. Sätt att åstadkomma en skarvförsegling av polymer- belagd aluminium med induktionsvärme, k ä n n e t e c k- n a t därav, att strömmen i en induktor (2) vid skarven koncentreras genom att flera parallella, strömförande ledare (4, 5) läggs intill varandra.1. A method of providing a splice seal of polymer-coated aluminum with induction heat, characterized in that the current in an inductor (2) at the splice is concentrated by laying several parallel, current-carrying conductors (4, 5) next to each other. 2. Sätt enligt krav 1, k ä n n e t e c k n a t därav, att fyra litztrádar (5) läggs i livet på en I-balk (4), vilken utgör en femte ledare och ett tryckapplice- ringsorgan.2. A method according to claim 1, characterized in that four litz wires (5) are laid alive on an I-beam (4), which constitutes a fifth conductor and a pressure applicator. 3. Sätt enligt krav 1, k ä n n e t e c k n a t därav, att en kopparremsa (7) eller liknande anordnas på en dorn eller ett mothàll (3) för induktorn (2) i anslutning till det ställe där strömmen vänder från induktorlindningen (4, 5) till returledarna.3. A method according to claim 1, characterized in that a copper strip (7) or the like is arranged on a mandrel or an abutment (3) for the inductor (2) in connection with the place where the current turns from the inductor winding (4, 5). to the return leaders. 4. Anordning för att åstadkomma en skarvförsegling av polymerbelagd aluminium med induktionsvärme, k ä n n e- t e c k n a d därav, att en induktor (2) för ansättning vid skarven är försedd med flera intill varandra anordnade, strömförande ledare (4, 5) för att bilda en induktorlind- ning.Device for providing a splice seal of polymer-coated aluminum with induction heat, characterized in that an inductor (2) for mounting at the splice is provided with several adjacent, conducting conductors (4, 5) for forming an inductor winding. 5. Anordning enligt krav 4, k ä n n e t e c k n a d därav, att fyra litztràdar (5) är anordnade i livet pà en I-balk (4), vilken utgör en femte ledare och ett tryckappliceringsorgan.Device according to claim 4, characterized in that four litz wires (5) are arranged in the web on an I-beam (4), which constitutes a fifth conductor and a pressure application means. 6. Anordning enligt krav 5, k ä n n e t e c k n a d att returledare av litztràd (5) (2) intill varandra på avstånd från induktorlindningen. därav, är lagda i induktornDevice according to claim 5, characterized in that return conductors of litz wire (5) (2) are adjacent to each other at a distance from the inductor winding. hence, are laid in the inductor 7. Anordning enligt krav 6, k ä n n e t e c k n a d därav, att returledarna (5) är täckta av en kopparplåt (6) för fördelning av strömmen.Device according to claim 6, characterized in that the return conductors (5) are covered by a copper plate (6) for distributing the current. 8. Anordning enligt krav 4, k ä n n e t e c k n a d därav, att induktorlindningen (4, 5) är infälld i ferritisk massa för koncentrering av strömmen. 507 sheDevice according to claim 4, characterized in that the inductor winding (4, 5) is recessed in ferritic mass for concentrating the current. 507 she 9. Anordning enligt krav 4, k ä n n e t e c k n a d därav, att en kopparremsa (7) eller liknande är anordnad på. en dorn eller ett mothâll (3) för induktorn (2) i anslutning till det ställe där strömmen vänder från induktorlindningen ((4, S) till returledarna.Device according to claim 4, characterized in that a copper strip (7) or the like is arranged on. a mandrel or a stop (3) for the inductor (2) adjacent to the place where the current turns from the inductor winding ((4, S) to the return conductors.
SE9504565A 1995-12-20 1995-12-20 Method and apparatus for providing a joint seal of polymer-coated aluminum SE507308C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9504565A SE507308C2 (en) 1995-12-20 1995-12-20 Method and apparatus for providing a joint seal of polymer-coated aluminum
AU12186/97A AU1218697A (en) 1995-12-20 1996-12-19 A method and device for accomplishing a joint of polymer lined aluminium
PCT/SE1996/001703 WO1997022523A1 (en) 1995-12-20 1996-12-19 A method and device for accomplishing a joint of polymer lined aluminium

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SE9504565A SE507308C2 (en) 1995-12-20 1995-12-20 Method and apparatus for providing a joint seal of polymer-coated aluminum

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SE9504565L SE9504565L (en) 1997-06-21
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6412252B1 (en) 1996-11-15 2002-07-02 Kaps-All Packaging Systems, Inc. Slotted induction heater
EP0842854B1 (en) * 1996-11-15 2001-03-07 Auto-Mate Technologies, LLC Induction sealing apparatus for sealing a foil cap to a container opening
US6747252B2 (en) 1996-11-15 2004-06-08 Kenneth J. Herzog Multiple head induction sealer apparatus and method
US6092643A (en) * 1997-11-07 2000-07-25 Herzog; Kenneth Method and apparatus for determining stalling of a procession of moving articles
US6633480B1 (en) 1997-11-07 2003-10-14 Kenneth J. Herzog Air-cooled induction foil cap sealer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE518744A (en) * 1952-03-28
SE338424B (en) * 1969-06-23 1971-09-06 Spiess C F & Sohn
SE383857B (en) * 1969-10-03 1976-04-05 Karlsruhe Augsburg Iweka DEVICE FOR THE PRODUCTION OF CROSS-CLOSES FOR SUBPRESSIBLE TUBE-SHAPED CONTAINERS USING PA INDUCTIVE ROAD SUPPLY HIGH FREQUENCY ENERGY
DE2653753C2 (en) * 1976-11-26 1986-04-17 Robert Bosch Gmbh, 7000 Stuttgart Device for producing a packaging tube from a packaging material web by welding the edge areas
SE410788B (en) * 1977-06-20 1979-11-05 Akerlund & Rausing Ab INDUCTION WELDING DEVICE
US4237360A (en) * 1978-11-06 1980-12-02 Aluminum Company Of America Induction heat sealing
SE500572C2 (en) * 1990-10-11 1994-07-18 Tetra Laval Holdings & Finance Device for induction welding

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AU1218697A (en) 1997-07-14
SE9504565D0 (en) 1995-12-20
SE9504565L (en) 1997-06-21

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